← The evidence ledger
Evidence row 119826
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/explorer/contract
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 1b26c40f41b6938233ba5587cb48532033fb57214d14d90c85e2580908d5225b
- Leaf
- 0xc4b105bb03978db10eeb93763d69911f521573da5a02e3b8c19e1cb7a9bc90d2
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/explorer/contract"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:explorer-contrac",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:explorer-contrac",
"name": "USD Coin",
"note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:137",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:explorer-contrac",
"name": "USD Coin",
"note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:42161",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"memo": "saylor:datadesk:explorer-contrac",
"reference": "HEY9wWqRBQA2A7BDpcnMe3ii958zoaj1EtiFrH2MSFG1",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpleHBsb3Jlci1jb250cmFjdCIsInJlZmVyZW5jZSI6IkhFWTl3V3FSQlFBMkE3QkRwY25NZTNpaTk1OHpvYWoxRXRpRnJIMk1TRkcxIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1NTMzNTIyMjJ9.cOZXnkXQ3DpmEiiCnQyUXY65KqBu0mZgW1hE3f1FPdo"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"memo": "saylor:datadesk:explorer-contrac",
"reference": "7Ldue5P5PjcF4VZDX11MnTifMT166GChSgwYNvkRKFrX",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpleHBsb3Jlci1jb250cmFjdCIsInJlZmVyZW5jZSI6IjdMZHVlNVA1UGpjRjRWWkRYMTFNblRpZk1UMTY2R0NoU2d3WU52a1JLRnJYIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1NTMzNTIyMjJ9.AG_7vn9FotIoma7qLz4Ely626nK-sulWxp67S3VkNAc"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "91561",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:explorer-contrac",
"native": true,
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"quotedLamports": "94393",
"reference": "6spwP7QfWtAZjiNafmhn9En7n6mAEqtAyJ6pAXxdm3sa",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpleHBsb3Jlci1jb250cmFjdCIsInJlZmVyZW5jZSI6IjZzcHdQN1FmV3RBWmppTmFmbWhuOUVuN242bUFFcXRBeUo2cEFYeGRtM3NhIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkxNTYxLCJleHAiOjE3OTI1NTMzNTIyMjJ9.nokryfBo3m7_HMzwdetDwC1g3dJzkxLVwDnIKX7Nf5E",
"solUsdPrice": 105.94
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "EVM contract bytecode facts on 16 chains: code hash and size, proxy type and implementation, admin, and the list of function selectors in the dispatcher.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
"chain": "ethereum"
},
"type": "http"
},
"output": {
"example": {
"address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
"chain": "ethereum",
"chain_id": 1,
"code_hash": "0xd80d4b7c890cb9d6a4893e6b52bc34b56b25335cb13716e0d1d31383e6b41505",
"code_size_bytes": 2186,
"function_selector_count": 5,
"function_selectors": [
{
"name": "upgradeTo(address)",
"selector": "0x3659cfe6"
},
{
"name": "upgradeToAndCall(address,bytes)",
"selector": "0x4f1ef286"
},
{
"name": null,
"selector": "0x5c60da1b"
},
{
"name": null,
"selector": "0x8f283970"
},
{
"name": null,
"selector": "0xf851a440"
}
],
"implementation": "0x43506849D7C04F9138D1A2050bbF3A0c054402dd",
"is_proxy": true,
"note": "Static facts from the deployed bytecode via chain RPC. Selectors are extracted from the dispatcher (PUSH4 ... EQ), so a few unusual contracts may show fewer. name is filled only for selectors in a small built-in table; resolve others with the contract/abi route when the contract is verified. opcode_flags come from walking the instruction stream, but code reached only through data or jumps can still be misread, so treat them as hints, not findings. A delegatecall opcode is normal in proxies and libraries.",
"opcode_flags": {
"has_delegatecall_opcode": true,
"has_selfdestruct_opcode": false
},
"proxy_admin": "0x807a96288A1A408dBC13DE2b1d087d10356395d2",
"proxy_type": "storage-slot proxy (EIP-1967 / ZeppelinOS / EIP-1822)",
"selectors_truncated": false,
"source": "Chain JSON-RPC (ethereum)"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"address": {
"description": "the contract address",
"type": "string"
},
"chain": {
"description": "chain name or id",
"type": "string"
}
},
"required": [
"chain",
"address"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"address": {
"description": "Account or contract address",
"type": "string"
},
"chain": {
"description": "Blockchain the data is for",
"type": "string"
},
"chain_id": {
"description": "EVM chain id",
"type": "number"
},
"code_hash": {
"description": "Code hash",
"type": "string"
},
"code_size_bytes": {
"description": "Code size, in bytes",
"type": "number"
},
"function_selector_count": {
"description": "Number of function selector",
"type": "number"
},
"function_selectors": {
"description": "Function selectors",
"type": "array"
},
"implementation": {
"description": "Implementation contract address behind a proxy",
"type": [
"string",
"null"
]
},
"is_proxy": {
"description": "True when the contract is a proxy",
"type": "boolean"
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"opcode_flags": {
"description": "Opcode flags",
"type": "object"
},
"proxy_admin": {
"description": "Proxy admin",
"type": [
"string",
"null"
]
},
"proxy_type": {
"description": "Proxy type",
"type": [
"string",
"null"
]
},
"selectors_truncated": {
"description": "Selectors truncated",
"type": "boolean"
},
"source": {
"description": "Data source the values come from",
"type": "string"
}
},
"required": [
"chain",
"chain_id",
"address",
"code_size_bytes",
"code_hash",
"is_proxy",
"function_selectors",
"note",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-21T03:27:12.275Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-21T03:27:12.066Z"
},
"resource": "https://saylorinnovations.com/api/explorer/contract",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"contract bytecode analysis",
"proxy contract detect",
"function selectors list",
"contract code hash",
"eip1967 proxy check"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "EVM contract bytecode facts on 16 chains: code hash and size, proxy type and implementation, admin, and the list of function selectors in the dispatcher."
}What the leaf hashes
{"body":"1b26c40f41b6938233ba5587cb48532033fb57214d14d90c85e2580908d5225b","id":119826,"kind":"listing","method":"baseline/1","observed_us":1793025616545367,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/explorer/contract","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0xc4b0f0ef1523c07b421e7890f9477903f6b1227699ed5c5074a5b6dec44659a7
- 0xe45faf6df0e6c9ea37e0dc8a52203c9b16c30922b0d51de6514db41dcfebad64
- 0xf237213321f570e72188d65e0f55538bf36d8a38d651f7ed53baa5dcb6538fd9
- 0x7023e87f07129eaf041ea73bf58b1ba4f069486b75830dba5a8f7b392a9a091e
- 0x8a42c3c6f31ca82e9b17c53ef574a1dc337d618e78713c802acab7f4f46470de
- 0xf378e0f1281ce14da3a179693a73bcf91e681d080c7864ee5459c2239219a3cb
- 0xf27b88e725c673443f779c0af5550e23026c66a6d7adf0f1a29828fba995d322
- 0x9a4dbd008ee45a13a2d2d44fac96ba439171be70eb85e2cddce8f70fdd94562a
- 0x0aaa0fc7f6b1e014f71cabe15ae65df3a64e05db353716b554b870df619811dd
- 0xae71c3940eac3236f4c68fb44d25cc1262b73d017fd7c18fbff1248c2e850602
- 0x463fef738ef71a01d4aa9ac1c6836fcf6802cdaa7de01bbe42397d79d35d8671
- 0x4d1a020de7fc0aa076daeb62ebb904d51ac6c607b605eb63a7855f34d7b69f1b
- 0x641fba1f23ec69d96721e34ace1926954d835b9614cb5eae215a069c056399b8
- 0xdbe2e8dd65ea1248b2936612538f18268abd5cf27ebdab3737694571ad496004
- 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
- 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae